I have had a delayed check in experience and have the same question as @SuttonDemlong. It would be nice to hear from someone at Southwest about this issue. TL;DR - I hope this is a Southwest "glitch" and that it will resolve itself. But I'm seeing 5-10 seconds delay after the 24 hour check-in window opens. Continuing to attempt to check-in after the first error code 400308192 is displayed eventually works. I believe this delay started happening since the beginning of January. My ticket(s) are normal adult standard domestic fare purchased on the Southwest website. I have evidence of this check-in anomoly. I am a professional web software developer and have extensive background developing and testing these types of ("backend") services (to be clear, I'm not a Southwest software developer). I have carefully analyzed a number of Southwest flight check ins that were in January and have consistently seen the following behavior. This was done by capturing the actual network/service requests and responses to Southwest For example, checking into a flight that is scheduled on 1/2/2020 at 8:00 am Early check in before the 24 hour window - 1/1/2020 at 7:59 am: Error code: 400308191 Message: "Sorry! This reservation is not eligible for check in." Check in at 1/1/2020 at 8:00 am: Error code: 400308192 Message: "Sorry! We can't check you into this flight. Please see a gate agent." Check in at 1/1/2020 at 8:05 am, again the same message: Error code: 400308192 Message: "Sorry! We can't check you into this flight. Please see a gate agent." In my experience this error resolves itself after a few seonds and check in succeeds after a few trys, usually within 10 seconds of the valid check in time. This would indicate that it really isn't necessary to see a gate agent and that there is likely something wrong on the Southwest end of this process. -Hedgey
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